Wireless power reception device

ABSTRACT

A wireless power reception device can include a first shielding member; a second shielding member; a short-range communication coil on the first shielding member; a wireless charging coil on the second shielding member; and a hole outside the wireless charging coil, in which the hole penetrates through the first shielding member.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a Continuation of U.S. patent application Ser. No.16/413,374, filed on May 15, 2019, which is a Continuation of U.S.patent application Ser. No. 15/505,016, filed on Feb. 17, 2017 (now U.S.Pat. No. 10,340,725, issued Jul. 2, 2019), which is the National Phaseof PCT International Application No. PCT/KR2015/008075, filed on Jul.31, 2015 which claims priority under 35 U.S.C. 119 (a) to PatentApplication No. 10-2014-0107020, filed in the Republic of Korea on Aug.18, 2014, all of which are hereby expressly incorporated by referenceinto the present application.

TECHNICAL FIELD

The present invention relates to a wireless power charging system and,more particularly, to a wireless power reception device of a wirelesspower charging system.

BACKGROUND ART

Generally, an electronic apparatus is driven using power stored in abattery. At this time, in the electronic apparatus, the battery may bereplaced or recharged. In order to charge the battery, the electronicapparatus includes a contact terminal contacting an external chargingdevice. That is, the electronic apparatus is electrically connected tothe charging device through the contact terminal. The contact terminalof the electronic apparatus is externally exposed and thus may becontaminated by foreign materials or short circuited by humidity. Inthis case, since contact failure occurs between the contact terminal andthe charging device, the battery of the electronic apparatus may not becharged.

In order to solve the above-described problem, a wireless power chargingsystem has been proposed. The wireless power charging system includes awireless power transmission device and a wireless power receptiondevice. Here, the electronic apparatus is implemented by a wirelesspower reception device. The wireless power charging system may usevarious charging methods. At this time, in order to receive power fromthe wireless power transmission device, a predetermined charging methodpre-set in the wireless power transmission device should be pre-set inthe wireless power reception device. To this end, if the chargingmethods of the wireless power transmission device and the wireless powerreception device are different, the wireless power reception device maynot receive power from the wireless power transmission device.

DISCLOSURE Technical Problem

Accordingly, the present invention proposes a wireless power receptiondevice for efficiently receiving power. The present invention provides awireless power reception device for receiving power according to aplurality of charging methods.

Technical Solution

According to an aspect of the present invention, there is provided awireless power reception device including an inner coil, a mountingmember having the inner coil mounted thereon and a slit formed in anedge of the inner coil, and a first shielding member and a secondshielding member laminated on the first shielding member and provided incorrespondence with the inner coil, the mounting member being mounted onthe first shielding member and the second shielding member.

The mounting member may include an inner mounting member provided insidethe slit and having the inner coil mounted thereon and an outer mountingmember provided outside the slit.

The mounting member may further include at least one bridge traversingthe slit and connecting the inner mounting member and the outer mountingmember.

The wireless power reception device may further include an outer coilmounted on the outer mounting member and surrounding the inner coil.

According to another aspect of the present invention, there is provideda wireless power reception device including a mounting member includingan inner mounting member and an outer mounting member surrounding theinner mounting member and an inner coil provided on the inner mountingmember. The mounting member includes a plurality of slits formed in aboundary region between the inner mounting member and the outer mountingmember and surrounding the inner coil, and the inner mounting member andthe outer mounting member have a step difference at a positioncorresponding to the slits.

The mounting member may further include at least one bridge connectingthe inner mounting member and the outer mounting member.

The wireless power reception device may further include a firstshielding member and a second shielding member laminated on the firstshielding member and provided in correspondence with the inner coil, andthe mounting member may be mounted on the first shielding member and thesecond shielding member.

The wireless power reception device may further include a cover havingan outer accommodation groove accommodating the outer mounting memberand an inner accommodation groove accommodating the inner mountingmember.

Advantageous Effects

A wireless power reception device according to the present inventionincludes a plurality of coils. At this time, a shielding member shieldsan electromagnetic field of each coil. That is, the shielding memberisolates the coils from the other components of the wireless powerreception device. Therefore, the coils may operate without performancedeterioration. In addition, when the coils operate, the shielding memberprotects the other components of the wireless power reception devicefrom the electromagnetic field. Therefore, the wireless power receptiondevice may receive power using the plurality of charging methods.Accordingly, it is possible to improve efficiency of the wireless powerreception device.

DESCRIPTION OF DRAWINGS

FIG. 1 is a block diagram showing a general wireless power chargingsystem.

FIG. 2 is a block diagram showing an example of a wireless powerreception device according to the present invention.

FIG. 3 is a block diagram showing another example of a wireless powerreception device according to the present invention.

FIG. 4 is an exploded perspective view showing a coil part according toan embodiment of the present invention.

FIGS. 5a and 5b are plan views showing a mounting member of FIG. 4.

FIG. 6 is a cross-sectional view taken along line A-A′ of FIG. 4.

BEST MODE

Hereinafter, the embodiments of the present invention will be describedin detail with reference to the accompanying drawings, in which the sameor similar portions are denoted by the same reference numerals. Indescribing the present invention, a detailed description of knownfunctions and configurations will be omitted when it may obscure thesubject matter of the present invention.

FIG. 1 is a block diagram showing a general wireless power chargingsystem.

Referring to FIG. 1, generally, the wireless power charging system 10includes a wireless power transmission device 20 and a wireless powerreception device 30.

The wireless power transmission device 20 is connected to a power supply11 to receive power from the power supply 11. Here, the wireless powertransmission device 20 may supply alternating current (AC) power. Inaddition, the wireless power transmission device 20 wirelessly transmitspower. In addition, the wireless power transmission device 20 transmitspower according to various charging methods. Here, the charging methodsinclude an electromagnetic induction method, a resonance method and aRF/Micro Wave Radiation method.

At this time, at least one of the charging methods may be pre-set in thewireless power transmission device 20. The wireless power transmissiondevice 20 may transmit power using the pre-set charging method. If atleast two of the charging methods are pre-set, the wireless powertransmission device 20 may select any one of the pre-set chargingmethods in correspondence with the wireless power reception device 30.

The wireless power reception device 30 receives power from the wirelesspower transmission device 20. Here, the wireless power reception device30 may receive AC power. The wireless power reception device 30 receivespower according to various charging methods. Here, the charging methodsinclude an electromagnetic induction method, a resonance method and aRF/Micro Wave Radiation method. In addition, the wireless powerreception device 30 is driven using power. Here, the wireless powerreception device 30 may convert AC power into DC power and use the DCpower.

At this time, at least one of the charging methods may be pre-set in thewireless power reception device 30. In addition, the wireless powerreception device 30 may receive power using the pre-set charging method.Here, if at least two charging methods are pre-set, the wireless powerreception device 30 may select any one of the pre-set charging methodsin correspondence with the wireless power transmission device 20.

Here, in order for the wireless power transmission device 20 to transmitpower to the wireless power reception device 30, the charging method ofthe wireless power transmission device 20 should be equal to that of thewireless power reception device 30.

FIG. 2 is a block diagram showing an example of a wireless powerreception device according to the present invention.

Referring to FIG. 2, the wireless power reception device 40 of thisexample includes a coil part 41, a charging unit 43, a load 47 and acontroller 49. At this time, the wireless power reception device 40 maybe implemented in various electronic apparatuses.

The coil part 41 wirelessly receives power. The coil part 41 receivespower according to the plurality of charging methods. Here, the chargingmethods include an electromagnetic induction method, a resonance methodand a RF/Micro Wave Radiation method. At this time, the coil part 41includes at least one coil. Here, the coil part 41 may include aplurality of coils. The coils may receive power according to differentcharging methods. In addition, the coil part 41 may receive AC powerfrom the wireless power transmission device 20.

The charging unit 43 converts power. Here, the charging unit 43 mayreceive AC power from the coil part 41 and convert AC power into DCpower. In addition, the charging unit 43 may include a rectifiercircuit, a smoothing circuit and a battery. The rectifier circuit mayconvert AC power into DC power. The smoothing circuit may remove an ACcomponent from DC power. The battery may store DC power.

The load 47 is driven using power. Here, the load 47 may be driven usingDC power received from the charging unit 43. At this time, if thewireless power reception device 40 is implemented in an electronicdevice, the load 47 may directly perform the additional function of theelectronic apparatus.

The controller 49 may perform overall operation related to wirelesscharging in the wireless power reception device 40. At this time, thecontroller 49 may detect the amount of power received by or stored inthe charging unit 43. The controller 49 may detect the amount of powerdischarged from the charging unit 43. To this end, the controller 49 maycontrol operation of the charging unit 43.

FIG. 3 is a block diagram showing another example of a wireless powerreception device according to the present invention.

Referring to FIG. 3, the wireless power reception device 50 of thisexample may include a coil part 51, a charging unit 53, a wirelesscommunication unit 55, a load 57 and a controller 59. At this time, thecomponents of the wireless power reception device 50 are similar tothose of the above-described example and thus a detailed descriptionthereof will be omitted.

In this example, the coil part 51 includes a plurality of coils. At thistime, at least one of the coils wirelessly receives power. Another coiltransmits and receives a wireless signal. Another coil may beimplemented by an antenna to transmit and receive a wireless signal inthe air.

The wireless communication unit 55 processes a wireless signal. Thewireless communication unit 55 processes the wireless signal accordingto a predetermined communication method. At this time, the wirelesscommunication unit 55 processes a transmitted signal as a wirelesssignal or processes a wireless signal as a received signal. Here, thecommunication method includes a short-range communication method. Forexample, the short-range communication method includes a near fieldcommunication (NFC) method.

The controller 59 performs overall operation related to wirelesscharging and wireless communication in the wireless power receptiondevice 50. At this time, the controller 59 may detect the amount ofpower received by or stored in the charging unit 53. The controller 59may detect the amount of power discharged from the charging unit 53. Tothis end, the controller 59 may control operation of the charging unit53. In addition, the controller 59 may control the wirelesscommunication unit 55 in correspondence with operation of the load 57.

FIG. 4 is an exploded perspective view showing a coil part according toan embodiment of the present invention. FIGS. 5a and 5b are plan viewsshowing a mounting member of FIG. 4. FIG. 5a shows the upper surface ofthe mounting member and FIG. 5b shows the lower surface of the mountingmember. FIG. 6 is a cross-sectional view taken along line A-A′ of FIG.4. Referring to FIGS. 4, 5 a, 5 b and 6, the coil part 100 of thepresent embodiment may include a mounting member 110, an inner coil 120,an outer coil 130, a shielding member 140 and a cover 150.

The mounting member 110 may have a rectangular shape and have roundedcorners.

The outer coil 130 may extend along the edge of the mounting member 110.The outer coil 130 may be curved with a predetermined curvature in eachcorner of the mounting member 110.

In addition, the inner coil 120 may be arranged in the center region ofthe mounting member 110. The inner coil 120 may have a circular,elliptical or rectangular shape or may be rounded in regionscorresponding to the corners of the mounting member 110 with apredetermined curvature.

The mounting member 110 supports the inner coil 120 and the outer coil130. At this time, the mounting member 110 has a single-layer structureor a multi-layer structure. Here, the mounting member 110 includes aprinted circuit board (PCB), a flexible PCB (FPCB) and a film.

Such a mounting member 110 may include an inner mounting member 111, anouter mounting member 113 and at least one bridge 115. The innermounting member 111 supports the inner coil 120 and the outer mountingmember 113 supports the outer coil 130. Here, the outer mounting member113 surrounds the inner mounting member 111. At this time, a slit 117 isformed in the mounting member 110. The slit 117 is formed between theinner mounting member 111 and the outer mounting member 113. In otherwords, the slit 117 is formed in the edges of the inner mounting member111. That is, the slit 117 may be formed in the boundary region betweenthe outer mounting member 113 and the inner mounting member 111. Here,the slit 117 may extend in various shapes such as an elliptical orpolygonal shape. That is, the slit 117 may extend in a shapecorresponding to that of the inner coil 120 to surround the peripheralpart of the inner coil 120. In addition, the inner mounting member 111is provided inside the slit 117 and the outer mounting member 113 isprovided outside the slit 117. The bridge 115 connects the innermounting member 111 and the outer mounting member 113. To this end, thebridge 115 is formed to traverse the slit 117.

In addition, the slit 117 may be divided into a plurality of slits bythe bridge 115 and the lengths of the plurality of slits may be equal ordifferent according to the position of the bridge 115.

In the bridge 115 may be a region through which an extension bar 123connecting the inner coil 120 and the below-described connection via 127or a terminal 126 connecting the inner coil 120 and the connection via127 passes. Accordingly, the position of the bridge 155 formed on themounting member 110 may be changed according to the position of theextension bar 123 and the terminal 126.

In addition, the outer mounting member 113 and the inner mounting member111 may have a step difference. That is, the inner mounting member 111may protrude from the outer mounting member 113 in a Z direction.Accordingly, the outer mounting member 113 and the inner mounting member111 may have the step difference at a position corresponding to the slit117. The outer mounting member 113 and the inner mounting member 111 maybe connected to each other through the bridge 115.

Alignment holes 119 are formed in the mounting member 110. Here, thealignment holes 119 penetrate through the mounting member 110. Inaddition, the alignment holes 118 include at least inner alignment hole119 a and at least one outer alignment hole 119 b. The inner alignmenthole 119 a is formed in the inner mounting member 111. Here, the inneralignment hole 119 a is formed in the inner mounting member 111 incorrespondence with the inner region of the inner coil 120. The outeralignment hole 119 b is formed in the outer mounting member 113. Here,the outer alignment hole 119 b is formed in the outer region of theinner coil 120 and the inner region of the outer coil 130.

The inner coil 120 receives power according to the pre-set chargingmethod. Here, the charging method of the inner coil 120 includes anelectromagnetic induction method, a resonance method and a RF/Micro WaveRadiation method. At this time, the inner coil 120 operates in apredetermined operation frequency band to receive power. For example, ifthe electromagnetic induction method is set in correspondence with theinner coil 120, the operation frequency band of the inner coil 120 maybe about 110 KHz to 205 KHz. Alternatively, if a resonance method is setin correspondence with the inner coil 120, the operation frequency bandof the inner coil 120 may be about 6.78 MHz. Here, upon operating theinner coil 120, an electromagnetic field may be formed in the peripheralregion of the inner coil 120. The inner coil 120 is mounted on themounting member 110. At this time, the inner coil 120 is mounted on theinner mounting member 111. That is, the inner coil 120 is providedinside the slit 117. Here, the inner coil 120 exposes the inneralignment hole 119 a of the mounting member 110. The inner coil 120 isformed on both surfaces, that is, the upper surface and the lowersurface, of the mounting member 110. The inner coil 120 includes a firstterminal 121, a first connection via 122, an inner extension bar 123, asecond terminal 126, a second connection via 127 and an inner lead-outbar 128.

The first terminal 121 corresponds to one end of the inner coil 120 andis provided in the inner region of the inner coil 120. Here, the firstterminal 121 may be provided on the upper surface of the mounting member110. The first connection via 122 is connected to the first terminal 121to penetrate through the mounting member 110. Here, the first connectionvia 122 may be connected to the first terminal 121 on the upper surfaceof the mounting member 110 to extend to the lower surface of themounting member 110. The inner extension bar 123 is connected to thefirst connection via 122 to extend to the outer region of the inner coil120. The inner extension bar 123 extends from the inner region to theouter region of the outer coil 130. Here, the inner extension bar 123may be connected to the inner connection via 122 on the lower surface ofthe mounting member 110 to be provided on the lower surface of themounting member 110.

The second terminal 126 corresponds to the other end of the inner coil120 and is provided in the outer region of the inner coil 120. Here, thesecond terminal 126 may be provided on the lower surface of the mountingmember 110. The second connection via 127 is connected to the secondterminal 126 to penetrate through the mounting member 110. Here, thesecond connection via 127 may be connected to the second terminal 126 onthe upper surface of the mounting member 110 to extend to the lowersurface of the mounting member 110. The inner lead-out bar 128 isconnected to the second connection via 127 to lead the second terminal126 out. Here, the inner lead-out bar 128 may extend from the lowersurface of the mounting member 110 to the outside of the outer coil 130.

The outer coil 130 transmits and receives a wireless signal according toa predetermined communication method. Here, the communication method maybe a short-range communication method, e.g., an NFC method, and theouter coil 130 may be a short-range communication antenna, e.g., an NFCantenna. At this time, the outer coil 130 operates in a predeterminedoperation frequency band to transmit and receive a wireless signal. Forexample, the operation frequency band of the outer coil 130 may be about13.56 MHz. Here, upon operating the outer coil 130, an electromagneticfield may be formed in the peripheral region of the outer coil 130.

Although an example in which the outer coil 130 transmits and receives awireless signal is disclosed in this embodiment, the present inventionis not limited thereto. That is, in this embodiment, the outer coil 130may receive power according to implementation of the present invention.More specifically, the outer coil 130 may receive power according to apredetermined charging method. Here, the charging method of the outercoil 130 may include an electromagnetic induction method, a resonancemethod and a RF/Micro Wave Radiation method. The charging method of theouter coil 130 may be different from that of the inner coil 120. At thistime, the outer coil 130 may operate in a predetermined operationfrequency band to receive power. Here, upon operating the outer coil130, an electromagnetic field may be formed in the peripheral region ofthe outer coil 130.

The outer coil 130 is provided outside the inner coil 120. At this time,the outer coil 130 surrounds the inner coil 120. The outer coil 130 ismounted on the mounting member 110. At this time, the outer coil 130 ismounted on the outer mounting member 113. Here, the outer coil 130exposes the outer alignment hole 119 b of the mounting member 110. Thatis, the outer coil 130 is provided outside the slit 117. In addition,the outer coil 130 is formed on both surfaces, that is, the uppersurface and the lower surface, of the mounting member 110. In addition,the outer coil 130 includes a third terminal 131, a third connection via132, an outer extension bar 133 and a fourth terminal 136.

The third terminal 131 corresponds to one end of the outer coil 130 andis provided in the inner region of the outer coil 130. Here, the thirdterminal 131 may be provided on the upper surface of the mounting member110. The third connection via 132 is connected to the third terminal 131to penetrate through the mounting member 110. Here, the third connectionvia 132 may be connected to the third terminal 131 on the upper surfaceof the mounting member 110 to extend to the lower surface of themounting member 110. The outer extension bar 133 is connected to thethird connection via 132 to extend to the outer region of the outer coil130. Here, the outer extension bar 133 may be connected to the outerconnection via 132 on the lower surface of the mounting member 110 to beprovided on the lower surface of the mounting member 110.

The fourth terminal 136 corresponds to the other end of the outer coil130 and is provided in the outer region of the outer coil 120. Here, thefourth terminal 136 may be provided on the lower surface of the mountingmember 110.

The shielding member 140 isolates the inner coil 120 and the outer coil130. That is, the shielding member 140 isolates the inner coil 120 andthe outer coil 130 from the other components of the wireless powerreception device. At this time, the shielding member 140 protrudesupward in correspondence with the inner coil 120. Here, the shieldingmember 140 has a step difference in correspondence with the edge of theinner coil 120, that is, the slit 117 of the mounting member 110. Tothis end, the shielding member 140 includes a first shielding member 141and a second shielding member 145.

The first shielding member 141 is provided for the outer coil 130. Atthis time, the first shielding member 141 supports the second shieldingmember 145, the mounting member 110, the inner coil 120 and the outercoil 130. The first shielding member 141 isolates the outer coil 130. Atthis time, the first shielding member 141 shields the operationfrequency band of the outer coil 130. That is, upon operating the outercoil 130, the first shielding member 141 blocks the electromagneticfield of the outer coil 130.

Alignment holes 143 are formed in the first shielding member 141. Here,the alignment holes 143 penetrate through the first shielding member141. The alignment holes 143 include at least one inner alignment hole143 a and at least one outer alignment hole 143 b. The inner alignmenthole 143 a is formed in correspondence with the inner alignment hole 119a of the mounting member 110. Here, the inner alignment hole 143 a islocated on the same axis as the inner alignment hole 119 a of themounting member 110. The outer alignment hole 143 b is formed incorrespondence with the outer alignment hole 119 b of the mountingmember 110. Here, the outer alignment hole 143 b is located on the sameaxis as the outer alignment hole 119 b of the mounting member 110.

The second shielding member 145 is provided for the inner coil 120. Atthis time, the second shielding member 145 supports the inner mountingmember 111 and the inner coil 120 on the mounting member 110. Inaddition, the second shielding member 145 isolates the inner coil 120.Here, the second shielding member 145 shields the operation frequencyband of the inner coil 120. That is, upon operating the inner coil 120,the second shielding member 145 blocks the electromagnetic field of theinner coil 120.

The second shielding member 145 is laminated on the first shieldingmember 141. At this time, the second shielding member 145 is provided incorrespondence with the inner coil 120. Here, the second shieldingmember 145 may have an area corresponding to that of the inner mountingmember 111. The second shielding member 145 may have a thicknesscorresponding to the width of the slit 117, that is, the length of thebridge 115 traversing the slit 117, of the mounting member 110.

At least one inner alignment hole 147 is formed in the second shieldingmember 145. Here, the inner alignment hole 147 penetrates through thesecond shielding member 145. In addition, the inner alignment hole 147is formed in correspondence with the inner alignment hole 119 a of themounting member 110 and the inner alignment hole 143 a of the firstshielding member 141. Here, the inner alignment hole 147 is located onthe same axis as the inner alignment hole 119 a of the mounting member110 and the inner alignment hole 143 a of the first shielding member141.

At this time, the first shielding member 141 and the second shieldingmember 145 may have different physical properties. Here, the firstshielding member 141 and the second shielding member 145 may differentpermeabilities μ. The permeability of the first shielding member 141 maybe maintained in a resonance frequency band of the outer coil 130. Tothis end, it is possible to suppress the loss rate of the firstshielding member 141 in the resonance frequency band of the outer coil130. The permeability of the second shielding member 145 may bemaintained in a resonance frequency band of the inner coil 120. To thisend, it is possible to suppress the loss rate of the second shieldingmember 145 in the resonance frequency band of the inner coil 120.

The shielding member 140 may be composed of ferrite. That is, theshielding member 140 may include metal powders and a resin material.Here, the metal powders may include soft ferrite metal powers, aluminum(Al), metal silicon, iron oxide (FeO; Fe3O4; Fe2O3), etc. In addition,the resin material may include thermoplastic resin, e.g., polyolefinelastomer. At this time, the metal powders of the first shielding member141 may be different from those of the second shielding member 145.Meanwhile, the metal powders of the first shielding member 141 may beequal to that of the second shielding member 145. However, the weightratio of the first shielding member 141 may be different from that ofthe second shielding member 145. Alternatively, the mixture ratio of themetal powders of the first shielding member 141 may be different fromthat of the metal powders of the second shielding member 145. Inaddition, the first shielding member 141 and the second shielding member145 may have the same thickness or different thicknesses.

The cover 150 protects the mounting member 110, the inner coil 120, theouter coil 130 and the shielding member 140. At this time, the upper andlower surfaces of the cover 150 may be planar. Alternatively, at leastone of the upper surface or the lower surface of the cover 150 may becurved. Here, at least one of the upper surface or the lower surface ofthe cover 150 may be convexly formed in the upper direction.

The cover 150 may be provided on the mounting member 110, the inner coil120 and the outer coil 130. An inner accommodation groove 151 and anouter accommodation groove 153 are formed in the cover 150. Here, theinner accommodation groove 151 and the outer accommodation groove 153are concavely formed in the upper direction. In addition, the depth ofthe inner accommodation groove 151 is equal to or greater than that ofthe outer accommodation groove 153. The inner accommodation groove 151is formed in the inner side of the cover 150. At this time, the inneraccommodation groove 151 is located in correspondence with the innercoil 120 and the inner mounting member 113. In addition, the inneraccommodation groove 151 accommodates at least portions of the innercoil 120, the inner mounting member 111 and the second shielding member145. That is, the inner accommodation groove 151 may accommodate theinner coil 120 provided on the inner mounting member 113 protruding fromthe outer mounting member 113 in a Z direction. In addition, the outeraccommodation groove 153 is located in correspondence with the outercoil 130 and the outer mounting member 113. Here, the outeraccommodation groove 153 surrounds the inner accommodation groove 151.In addition, the outer accommodation groove 153 accommodates at leastportions of the outer coil 130, the outer mounting member 113 and thefirst shielding member 141.

Although not shown, the coil part 100 of this embodiment may furtherinclude an adhesion part (not shown). The adhesion part may beinterposed between the mounting member 110 and the shielding member 140.That is, the adhesion part may adhere the mounting member 110 and theinner coil 120, the outer coil 130 and the shielding member 140 on thelower surface of the mounting member 110. At this time, an opened regionmay be formed in the adhesion part in correspondence with the slit 117of the mounting member 110. In addition, the adhesion part may includean inner adhesion part and an outer adhesion part. The inner adhesionpart may be disposed between the inner mounting member 111 and thesecond shielding member 145 and the outer adhesion part may be disposedbetween the outer mounting member 113 and the first shielding member141. Here, the inner adhesion part and the outer adhesion part may beconnected to or separated from each other.

Although not shown, the coil part 100 of this embodiment may furtherinclude a protection part (not shown). The protection part may protectthe mounting member 110, the inner coil 120 and the outer coil 130 onthe upper surface of the mounting member 110. At this time, an openedregion may be formed in the protection part in correspondence with theslit 117 of the mounting member 110. The protection part may include aninner protection part and an outer protection part. The inner protectionpart may cover the inner mounting member 111 and the inner coil 120, andthe outer protection part may cover the outer mounting member 113 andthe outer coil 130. Here, the inner protection part and the outerprotection part may be connected to or separated from each other.

Although an example in which one inner coil 120 is mounted on the innermounting member 111 is disclosed in the above-described embodiment, thepresent invention is not limited thereto. That is, a plurality of innercoils 120 may be mounted on the inner mounting member 111 according tothe implementation of the present invention. For example, two innercoils 120 may be mounted on the inner mounting member 111. At this time,the inner coils 120 may receive power according to different chargingmethods. The inner coils 120 may be provided inside of the slit 117. Inaddition, any one of the inner coils 120 may surround the other of theinner coils 120. Here, the inner coils 120 may expose the inneralignment holes 119 a of the mounting member 110.

Although an example in which one outer coil 130 is mounted on the outermounting member 113 is disclosed in the above-described embodiment, thepresent invention is not limited thereto. That is, a plurality of outercoils 130 may be mounted on the outer mounting member 113 according tothe implementation of the present invention. For example, two outercoils 130 may be mounted on the outer mounting member 113. At this time,the outer coils 130 may receive power according to different chargingmethods. Alternatively, any one of the outer coils 130 may transmit andreceive a wireless signal according to a predetermined communicationmethod and the other of the outer coils 130 may receive power accordingto a predetermined charging method. The outer coils 130 may be providedoutside the slit 117. In addition, any one of the outer coils 130 maysurround the other of the outer coils 130. Here, the outer coils 130 mayexpose the outer alignment hole 119 b of the mounting member 110.

Although an example in which most of the inner coil 120 and the outercoil 130 is provided on the upper surface of the mounting member 110 andends of the inner coil 120 and the outer coil 130 are provided on theupper and lower surfaces of the mounting member 110 is disclosed in theabove-described embodiment, the present invention is not limitedthereto. That is, most of the inner coil 120 and the outer coil 130 maybe provided on the lower surface of the mounting member 110 according toimplementation of the present invention. In this case, the ends of theinner coil 120 and the outer coil 130 are provided on the upper andlower surfaces of the mounting member 110. For example, in the innercoil 120, the first terminal 121 is provided on the lower surface of themounting member 110, the inner extension bar 123 is provided on theupper surface of the mounting member 110, the second terminal 126 isprovided on the upper surface of the mounting member 110, and the innerlead-out bar 128 may be provided on the upper surface of the mountingmember 110. In the outer coil 130, the third terminal 131 may beprovided on the lower surface of the mounting member 110, the outerextension bar 133 may be provided on the upper surface of the mountingmember 110, and the fourth terminal 136 may be provided on the uppersurface of the mounting member 110.

According to the present invention, the second shielding member 145 islaminated on the first shielding member 141. Here, the inner alignmenthole 143 a of the first shielding member 141 and the inner alignmenthole 147 of the second shielding member 145 are aligned along the sameaxis. The mounting member 110 are mounted on the first shielding member141 and the second shielding member 145. Here, the inner alignment hole119 a of the mounting member 110 is aligned along the same axis as theinner alignment hole 143 a of the first shielding member 141 and theinner alignment hole 147 of the second shielding member 145. Inaddition, the outer alignment hole 119 b of the mounting member 110 isaligned along the same axis as the outer alignment hole 143 b of thefirst shielding member 141. To this end, the first shielding member 141,the second shielding member 145 and the mounting member 110 may beaccurately positioned. Further, in the wireless power reception device,the inner coil 120 and the outer coil 130 may be aligned at desiredpositions in correspondence with the wireless power transmission device.To this end, the wireless power reception device may efficiently receivepower.

A step difference is formed between the first shielding member 141 andthe second shielding member 145. In addition, the slit 117 of themounting member 110 accommodate the step difference of the shieldingmember 140. To this end, the mounting member 110 is flexibly mounted onthe shielding member 140. Accordingly, at least portions of the mountingmember 110, the inner coil 120, the outer coil 130 and the shieldingmember 140 may be accommodated in the cover 150 regardless of the shapeof the cover 150. That is, as the lower surface of the cover 150 iscurved, at least portions of the mounting member 110, the inner coil120, the outer coil 130 and the shielding member 140 may be accommodatedin the cover 150. In addition, although the lower surface of the cover150 is formed in a planar shape, at least portions of the mountingmember 110, the inner coil 120, the outer coil 130 and the shieldingmember 140 may be accommodated in the cover 150. Here, at least portionsof the mounting member 110, the inner coil 120, the outer coil 130 andthe shielding member 140 may be accommodated in at least one of theinner accommodation groove 151 or the outer accommodation groove 153 ofthe cover 150. The shape of the cover 150 may be variously designed.

The shielding member 140 shields the electromagnetic fields of the innercoil 120 and the outer coil 130. That is, the shielding member 140isolates the inner coil 120 and the outer coil 130 from the othercomponents of the wireless power reception device. To this end, theinner coil 120 and the outer coil 130 may operate without performancedeterioration. In addition, when the inner coil 120 and the outer coil130 operate, the shielding member 140 protect the other components ofthe wireless power reception device from the electromagnetic field. Tothis end, the wireless power reception device may receive poweraccording to the plurality of charging methods. Accordingly, it ispossible to improve efficiency of the wireless power reception device.

The above exemplary embodiments are therefore to be construed in allaspects as illustrative and not restrictive. The scope of the inventionshould be determined by the appended claims and their legal equivalents,not by the above description, and all changes coming within the meaningand equivalency range of the appended claims are intended to be embracedtherein.

INDUSTRIAL APPLICABILITY

The present invention may be used in the wireless power charging fieldrelated to transmission and reception units capable of wirelesslytransmitting and receiving power and a wireless power transmissionsystem including the same.

The invention claimed is:
 1. A wireless power reception device,comprising: a first shielding member; a second shielding member; ashort-range communication coil on the first shielding member; a wirelesscharging coil on the second shielding member, wherein the wirelesscharging coil is disposed inside of the short-range communication coil;and a hole outside the wireless charging coil between the short-rangecommunication coil and the wireless charging coil, wherein the holepenetrates through the first shielding member.
 2. The wireless powerreception device according to claim 1, wherein the hole is disposedoutside of the second shielding member.
 3. The wireless power receptiondevice according to claim 1, further comprising a mounting member,wherein the first and second shielding members are disposed on themounting member.
 4. The wireless power reception device according toclaim 3, wherein the hole penetrates through the first shielding memberand the mounting member.
 5. The wireless power reception deviceaccording to claim 1, wherein the second shielding member has a curvededge portion, wherein the short-range communication coil includes atleast one outer corner portion, and wherein the hole in the firstshielding member is disposed closer to the curved edge portion of thesecond shielding member than the at least one outer corner portion ofthe short-range communication coil.
 6. The wireless power receptiondevice according to claim 1, wherein the wireless charging coil has acurved outer edge, wherein the short-range communication coil includesat least one outer corner portion, and wherein the hole in the firstshielding member is disposed closer to the curved outer edge of thewireless charging coil than the at least one outer corner portion of theshort-range communication coil.
 7. The wireless power reception deviceaccording to claim 1, wherein the short-range communication coil has arectangular shape, and wherein the wireless charging coil has arectangular shape.
 8. The wireless power reception device according toclaim 1, wherein a permeability of the first shielding member isdifferent from a permeability of the second shielding member.
 9. Thewireless power reception device according to claim 1, further comprisingan adhesion part disposed between the first mounting member and theshielding member, wherein the hole penetrates through the adhesion part.10. The wireless power reception device according to claim 1, whereinthe wireless charging coil is disposed inside of the short-rangecommunication coil such that an outermost portion of the wirelesscharging coil is smaller than the innermost portion of the short-rangecommunication coil.
 11. The wireless power reception device according toclaim 10, wherein the wireless charging coil and the short-rangecommunication coil are approximately circular and an outermostcircumference of the wireless charging coil is smaller than theinnermost circumference of the short-range communication coil.
 12. Awireless power reception device, comprising: a first shielding member; asecond shielding member; a short-range communication coil on the firstshielding member; a wireless charging coil on the second shieldingmember in an area inside a perimeter of the short-range communicationcoil; and a hole outside the wireless charging coil and the secondshielding member, wherein the hole penetrates through the firstshielding member, wherein the hole is disposed between the short-rangecommunication coil and the wireless charging coil, and wherein the holeis outside of the second shielding member.
 13. The wireless powerreception device according to claim 12, further comprising a mountingmember, wherein the first and second shielding members are disposed onthe mounting member.
 14. The wireless power reception device accordingto claim 13, wherein the hole penetrates through the first shieldingmember and the mounting member.
 15. The wireless power reception deviceaccording to claim 12, wherein the second shielding member has a curvededge portion, wherein the short-range communication coil includes atleast one outer corner portion, and wherein the hole in the firstshielding member is disposed closer to the curved edge portion of thesecond shielding member than the at least one outer corner portion ofthe short-range communication coil.
 16. A wireless power receptiondevice, comprising: a first shielding member; a mounting member on thefirst shielding member; a short-range communication coil on the mountingmember; a wireless charging coil inside the short-range communicationcoil; a second shielding member on the wireless charging coil; and ahole outside the wireless charging coil between the short-rangecommunication coil and the wireless charging coil, wherein the holepenetrates through the first shielding member.
 17. The wireless powerreception device according to claim 16, wherein the hole penetratesthrough the mounting member.
 18. The wireless power reception deviceaccording to claim 16, wherein the second shielding member has a curvededge portion, wherein the short-range communication coil includes atleast one outer corner portion, and wherein the hole in the firstshielding member is disposed closer to the curved edge portion of thesecond shielding member than the at least one outer corner portion ofthe short-range communication coil.
 19. The wireless power receptiondevice according to claim 16, wherein the wireless charging coil has acurved outer edge, wherein the short-range communication coil includesat least one outer corner portion, and wherein the hole in the firstshielding member is disposed closer to the curved outer edge of thewireless charging coil than the at least one outer corner portion of theshort-range communication coil.
 20. The wireless power reception deviceaccording to claim 16, wherein the wireless charging coil is disposedinside of the short-range communication coil such that an outermostportion of the wireless charging coil is smaller than the innermostportion of the short-range communication coil.